Bee observation unit



Aug. 10, 1943. D. E. OBEIRNE 2,326,250y

BEE OBSERVATION UNIT Filed Aug. 19, 1941 3 Sheets-Sheet 1 j@ .2

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Aug- 10, 1943. D. E. OIBIRNE 2,326,250.

BEE OBSERVATION UNIT Filed Aug. 19, 1941 3 Sheets-Sheet' 2 NIW BEIRNE Aug. 10, 1943. D. E. O

BEE oBsERvATloN UNIT Filed Aug. 19, 1941 3 Sheets-Sheet 3 Patented Aug.y i j The present invention-:relates toa" bee observal tion unit. This "is"l a. type-"of confining enclosure orcage'in which afcolonyof bees maycarryon their life functions completely exposed 'for' study',

4and observation by interestedzper'sonsl 'YvSu'chan 'l observation unit serves a useful; purpose ixiclass :rooms and other `places where-v'inembers-iofgthe public mayV` gather to-receivevisual instruction' or first-hand' infomation respectingv beel life` The present observation -unit Iinc'orporate'fs'V in 'its structure variousv :improvements which*fa cilitate. the requisitefservicing Aof lthe cagefora prolonged andhealthy'dife ofthebee3colo'ny Y which.is-confnec'therein';` Theseimprovements'l15 rcomprise a simplifledfandmore eiective feeding trough; including the n'ieans-'byv which itis rerf j dered accessible'for-convenient relling; acornpartment jin Which-inlay loe"V placed acagecona'ncebyy the worker Vbees of the' colony;` a' mountf ing for one or inoreg'las's` sides Within the'str'ucture, so made vas.to-permitlfre "andf're'a'dy remov'al ofssuch iside/s s-bya downwilrclmovement Y through the bottomoftlieunit;` a'icentralfelongated opening through the unit bottom, normally` closed, but readilyopenable tof prinitftheftting thereto of the mouthpiece of a container..f rom which. bees may lbe, released for'gafdmisfsionlinto v taining. a :queen teel preliminary 'oo-- ner accept- Y the* conningenclosure; afeedtroughfwhich'iis t amply ventilatedand readilyiaccessibleforl the movement of i the bees "in `and out' thereof.: to-

gether with' means'fthe'rewi'thinv whereon ,the bees f maystandwhilegfeeding;. a queen' excluderfplate in conjunction with avertical-recess at one end -V of the conning Yenclosure andab'ove'a runway through Which'bees may pass inv androutof the cage, vthe plate promoting thejcollection ot'kdroppings onthe outsideof therecesswhichremains clear in consequence so-V that These various featuresof iconstruction,v as well' as others which?Will-hereinafterappear,A charf acterize the' present beeobservationV unit Yofwl'iich certain preferred lembodiments are' illustratedV ,in the, accompanyingdrawings inl the manner Yfol- Vcomprises 'by vpreference` three sections a, hand passage 'intoY land f vThe unit"coverfisnremoval)liffltted'in/jplacesoV asito As Shown, it; is..prvided with ariluralty'b Figure 1 is a perspectiveview 'ofV the present latter being shown in verticalsectinj :bee observationV unit fmountedf inav vwindowfthfe 55 f 'connected at' its .A extremities 1to thfend`wa11sE e'vation'al/View/ofir he is thereby provided'{Iorjr the y receptionr` of fthe l 'f honeycombV` and brood fra'rfnzes als will shortly b described.

c, j each elXtending "theQfu'll Vlength ,thereof and t #The middle: sectionb separated `from th'ebthers agdistance about lequal tothe thickness 'off-ith i of the unit, thenwfollowersh 28 'the-position which. is vacated by the deseen s'crvs'r 32, inay be employedto releasablylsecure Y Jinthe'upperjracze .of'thebotn assembled from-the remaining structuref If-this' introau 'thountii Vtop while' tiiefcoveg; ope'n to take upeconcurrently within the grc'iovesY ing.glasssidel In this way, the beeslafsls'lire of` 'continued confinement While,either-.orA of the transparent sidesndergo removal,'"{andfV i. also, 'by .a repetition of f the loperation,Ta"lsibseaA quentreplacement.

' In 6 I vhavershown'a strip ,didonne f l 26: VThis srtrip'isshown asilslightlyseparatediromVj.

fthebottorn `'board c thensafne' as when -being' removed l therefr' eiildgappear window :the'nfbeing-l reegtoowe'r tfsel, 'j while undergoing removal f r the removably fastened toV vthe, uni

In 101 have s dwf s free to descend .ey is shlftedlaterally upon the bt- ."suiifcableifasiienilfl,e'means,15115111 as a Y. 2,326,250I if transparent sidesV W, the "spaces thus provided V'".f.. .lo eingl.in registerjwiththe -window'sf'so as to Laccrnmodate therein fthe Vlower"edge portionsv i thereof, as shofvvnvin Fig-.6.. Asu'ppo'rtfor 'the Y 'lower edge of-each VWindow is also.1:)1ovidediri'i vthe manner presently to `be explained, and when 'fthe support is withdrawn Y the window restingfg' .jj-thereon is free to slide downwardly and hedis-Y o {adiiferentltype 'of support'mayibe afforded for-f the:other'zwirfdowasgbysa .fstnple'which underlies the bottom section c and "ilda'p'i'edrim',remet/#aisle securement thereto as ybyfag-p'lura'iity -of screws beam esj-py t nl@ portions thereof.

a' zsiottedfopeningf fio' hownfabottoin on'struction i ottoni mais normally preyenteaf gi 'therethroiig bytrfeimial Strap.

17o 'The ltiap exthas -length se ,ofthe potto-xf1,.tum1-ijs'slidamy'V krefrein;,limpianeffdwise m inent.

` nthe j another'reeess .35,5111 the Vupper f ace oi' the `botftom This accommodates the plate z' in the form of a, slide which extends lengthwise of the'bottom l eens ipffbpntofif.,supmrsiomnewmdows ,may v- 4be employedftheir characteristic 'featre being f removability so as to free each window for descent throgh theislot Vin the bottom, With the repair or other work, 1 th ereby facilitating the vservicethat.n'iay occasionally berequired if a colonyjof bees is to be maintained in healthy. conditionjover aprolonged period of time.

x.Thesliqg2-81exten-dinellenethwise throng-h .the

'Y Q bottpm gterminatesgs ort vof fthe, .forward rend a'QrQSS .the runway -Sfwithin ian arcuataslot Ya2.

shifted to fak position-...n which runwayto `preveiit ipassagejof-beestherethrongh;

' pursuance oftheinotheriifeactivities.- Toadapt f Ythe Vunitgifor finstallation 'at ywindows, 'which may '-VaIY;..VV.idS1Y1 *HS 'to Size, I -nd it advantageous to einplovlanjadjustable adapter,"as'best shown'in- Her-e,I'fhavejllustrated anA inside sill f Fig` 'lf3- A ,Sfnponfwhich is restedffthe bottom of the unit ,adjacent .its forwirdendf Ifthe-.window be=of Lheflidingjsash type, .as 'is usuaL'the lattervwill be raised-tothe pointfthat its bottom' railf i occupies a position; definitely above the 'outside sill 141W is Yusually down-.setgtorlie ingaflower incline'dfpl-ane@ Withinthe space thus provided Vbelow the Vsash is received'anextensibieadapter which, fa'sv showncomprisesya--rail ,r which is .i rabbetted alongits upperjoutside'tace 13o-'provide a recess 4 8 withinwhichp-may vbe Vreceived the lowerjinside., Corner portionof the sash rail'AS. The adapter Vrai1 1," srfurther rabbetted lto Vpro- V,li-,hereabove ifs-provided so v that bees may 'bein- Y,

troduced into theobservatifon unit in the manner. Aprevonslv, described. Y or `all of these several i ,windowrtaken away, Vthe interior 0i the bee observation Y unit is 'madeA accessible iol' cleaning,

creol??Y (seeP Fig.: i where have,v Iprovided-lin f' '.prolleeds inwardlyiro ,its 4forward extremity,

relate#pvotediaspatlil andfadaptedto .swing 'E :gtendi-ng laterallyvifrgm h iSpIateisan'armAS .positions ingwhichthe runwaygisfeb'strcted 01115" partly or "net-at all, i wherebymovemellt of'- bees Y through the runwayzrmaybe regulated, .asdes-ired. v Desirablythe arcuate, plateis provided witha plurality; oisrnallf'openings A4 yaior'.di,11g entilat-` ,ejfpa/.Ssages Sothat', whcnlin -olosed position', air E t nto the .enclosed `spa-ce vide asecond-recessg along its under and `inside ffacefwherein lmay 'be ,rec,elsflY .the stop shoulder Qthat .isgusually f ormedatfihezpointfofdownset 515. between theupperinside vsill andthe outside low;

'beers to moveinlandout.A i

The opposite end of thebee lslidable lengthwisefthereupon; and hai/ingv a or'- mally inseparable interlockstherewith.

v whenv the .bee observation Vuniti isiristanedi at associated sheathing is vLit-ted between th'fv lower rail of thesashgand sillztherebel-ow., af clearly shown inv Figs. v1`r and 53,V so as'tdclose'on the openingV betvw'ae'n` the room and 'theair-utside.

An adapter! frail of Vthis character is` extended laterally `from` the bee l u nit, "and -prefena-blyY fone oniyn'eed be providedlnrom the oppositeside fof the`-'unit is-extended another` rail-54 (preferably of cross-sectional formlthe same 'as the' VIrail unit in any-.desiredrmannen 'I'heyloccupya posi" r) whicnccntinues @n-to the endor herwindow Y opening 4so that thelobs'ervationunit may occupy a position intermediat'e'lyf of'theV Stiles :of -'the sash.

oneorbotnoffrhe raiisi'r' and smay'becon.

' .neeted to the forward-end :ojfitheobservation unit a'sby ahingel sol that the' frail "is ufree to swing alongside of the'v observation unitwhen the vlatter is to b e removedforstor-ag'e purposes, or'

to loe-shipped to its destination.' '-`At"all f o-the 'r times, however," e'achlhingedrail isfswung'fout or, positioned so as t'o'extendlengthwisegrossthe sill to furnish a closu'effor'ithe '-'spacevvh-ich una "derlies theVv Y opened sash, 'l thevr L onlyY entrance Vthrough that s'pace'being'jthatwhich'is'oppsite s the runway 35 where provision' is vtriade'for 'the tweenand through elongated slotsin onefo'fth'ern,

'obseivation lihit Y rest .upo ."'which extendsinwardlyinto the room 'shouldndesirablybe supported from'the floor. f1'o this Y -purpose Thai/e shown afstandlcomprisingfefpair of 'upightiegs -en'najving an'ssdciatedextensibie iframe Eil together `withbolts' ex'tendingy therebe- 3'o. Y l t 1 space. for. movement of ibeesupwardly through the projecahorizontaliy beyondfeacnfoppositegend', thereofii' Each*lugisdapted-to lie minima-slot@ support ifor ith l component. To;

`-ownfcrossslotgandfinfslightlylspaced relation; lt'othebrood'framef'therebelow,;solas to be freely 'A removable independently thereof' v Mil tha extends btran sversely1within'ithefinside 'with the, lower; :is similarly supported lwithin-`i`ts 'Above the. brood ,frames fare;:arranged. Ma; rplu- Y rality of honeycomb frames'x-I- I extending-hon; 'zontally across-the -unitsfIi-These several ',-ho'ne combi frames may, if/desiredg :be f'astenedgto gethen'a'ndbe secured within-'the beeobservation f tionwhich is rspaced fromtheuniti cover Cf so as, to permit' ofaccommodationof l a feeding trough TKWhi'ch willnowbeidesoribedf;A jr: Y

As shownthis'trollgh isiormed withja bottom J TS-andspaced sides Tl, through'whichfaretopene l 1 ings :18 slightly'below` theirfiupper"edgesiiacover '1B being 'extended over;tricitopsv ofthe'jsidesandg; 1 lif desiredgihingedly connected ''a'sat fto `Y'oneof that ofzthespace between. thtwo windowsgrbutthe 'i troughnsides- `l'lflie inwardly. :thereo'fgto fprovide openings-"Maand"through"togtheainsidethereof. f'

' EZ wherebir -to :secure the vfrarrie A ina fdesi'red VVVver-` l tica-l adjusted position relative' to thewstand.Y The frame may be conneotedto thezlbeefobservation unit aty the rear end ofthe latterfasby? a'bolt 63.

In'thisv away a, simple adjustable Asupport maybe,

provided for the-bee observation unitrat itsnner end so thatthe unit'will' bemaintainedatall timesV in a level position-as required bytheihelght of the sill on which its forward en d'isfrested. i

- itsoploositeI gend; yterm ating v 'per-mit"positionihgfof n tends downwardly -irornfjiistbelow thef cover-to a The forward end wally ofthe unit isformed alongits inside acewith'a slot A65 extenr'ling upwardly from-its `1owerend which is in 'communication with 'the runway l36.V 'This slot,as shown, proceeds upwardly `for av substantial distance and is closed'over bya queen excluder -plate 66 vhaving openings Blofy a size which vwill re-v strain-fa queen bee from'passing therethrough.

VWorker bees are f ree to y ascend or V descend through the slot and through-gthey plate :openings 61 so as to pass therethrough; lintoy the space within the observation unit. This excluder plate extendsiatits lowerfe'nd intocrthe runway-35 and bees passing .therethrough mayselect for this top of the plate, or any ofthe .others'inbetweem isv Y By this arrangement thelbeeszare-' preventedfrom v Y to provide 'aclos'ure which-'will prey'entbees from 'moving up beyond 'as'oendingz upwardly"Joeyoflliihu u a'iordedaccess toethe'trou'ghcJus "below this".

pointl Slightly spaedfromjtne xnfougrrv ottom;g Whengthecoveris open; thelend'fspaceifwithin the trough'beyond the-partitionis,exposed to re- ,t E Gfiih@ f unit, the opposite'trou'ghfendbeingclosed' bya wallV 85 beyond'which-i `asp'ace adapted'to' bei Y bridged b-y 'an extensionproceeding?frointhe' i trough end, here shown-"as alidfj-hinge'd as'at 81 and normally lurged' to' a closed position' jb-ya springf3. This.eXte'nsiongjlid?extends-crosswis'e of the space between theenclosure sides W's'oas the honeycomb frames into: feed'y troug When-'thislid unit. Its a queen bee,A cnnedf-witlfiin the cage,

Yfsu having, ifresiied; rommirinus sides erariaa j l bottomaliithrougliwhiehiivertical'jpassage-g Y A Y way adaptedvto belclosed-bya'plugil Jfzcandy:v Aor V the: like? l V'Wlier'thzis *page I is introduced in;

" =place, it ycomes ltb'grestagainstrastop pin- `Sib-theA flid'then pushing: againstloneY sidewthereofto hold Y the 'leage'l against the 'en'dfWallrofk` the Vvobservation normal? colonylliietrnay be carried onfunder ncr-l lmal conditions; l To accomplish this,y thel present structure vprovides fadequater facilities for a func. {,ftioningf'colonyof-bees; ia'sl'distinguished froma j l meredisplay container whereinith'eiconnedbees Y vided for oneor moreglassr sides, 'slidably tted'in te acceptes bytheiworker,besmthinthe unit,

the candy plug Willebe eaterLaunay;therebyfree;Y --ingr the queengbee toienter' into 4the spaiceftheref l 'fbelowto take upgthe-usua'l lifeifactivitiesfwhich rrhefdesprrphonfupmf zinspeelt hasv reference Y felusive,falthoughfmanyiof the'lfeaturesoffconj structiontherein lshownrnay,belincorporatedinto Vthe .modiiedrform of; unit which! isillustrated in the thetwc: eonstructionsof observation units are rthekrsame' jso'. itlsiat` further detailed Aele- Y' rThefobservation' unit nowvtdvbe described; and. r Ashownmorefparticiilarly.in'ligslllI-#lgis--one that f i'sradap'ted partijcularly'foravwallor inside inount- 1 place, and removable `.vertically so as to permit a' jfollower slide to occupy concurrentlythe position A'vacated by'the slide which is withdrawn; Also,

i without disturbance to thebeecolony, the central elongated slotinthebotomywhenuncovered,pro#

vides fan opening ,through :lwhich additionalbees,

or Lan: entire newcolony,V mayb'e introduced With- 1 out'involving anyd-isturbance,ofjparts--interiorly i Y :of. the.enclosure.r. According tothe `arrangement hereinldisc/1oSed;` provision is made for theintroduction" fromfgthe'gtop of1 Y a, queencages-Without openingiuprany passages throughwhich worker beesmay escapegtliiscaga-being.A freely removable feasibieffmmone sieeomypfthe uniti Af'pri:

` mary: characteristic: oi f aA VAunit .adapted` for usein l such an environment fis thatv it be' provided withaf vtranspaarent pane-Wioncne side only, the rearior SideABSbeingclosed byrabackingas'oi plywo'odzor V,iivalls'Ev of hegobservationunitfunder lC1est?riptt'lll;'

uponithei inner Afacing surfaces Iitc receive lugs T3 VL V'which-lare projected beyondtr'thef'ends voffthe Vtop rails ofxbroodfframeslFvyvherebythe'lattenmay be findividually,independentlyfand removablygsus pended"therein.` In each' ofthebroodframes the Y WaxoundationBIiqispositioned atgthe rear,,adjac-'i.YA L x V cent the'side 95, instead'of in anintermedi'atep05- f sitionginasmu'chgas .the bees; build `outfcell's onlylin ardirection whichfis toward the light. .fBe 'feausef the resulting-reduced number -ofce1ls,' Q *thel f rarnesV shduldA- desirably be' ofabout twicethe" i' f doupiearea,l ,smeeii is'possibie that'suchan 0b 'servation unit will be, placed a. room where" 1 'theregis ja wide Avariations-in temperature during CSO -eachvg twenty-four' hours,'fas for example in va f zstove-heated lmilding,V it isdesirable thatmeans be provided for protecting -tlie bees AWithin" the unitagainstadrop in temperature.which*usually` Y occursQveneaohnightlyperiodrjFor this purpose` Ihave providedan ,insulating board VSfljgironropj- -po'site edges of which project lugs198 eachv adapted to` twithin one'ofthe transverse groovesfM tv vhen* ithe board is fitted in place.' Q'With the board re'-. f moved for exposure of the bees "behindthe single glass pane W the structurewill: appear as repre sented in Figfll. *,'I'hevboard itself is shownfin Fig. 1 4 vand'when applied ingplaee theVV observation unit Willappear-as fshoyvn ingFig. 13. The rela-fv tionship. of the board Vtothe remaining parts with shown) isl madewith the runway at one end of the observation,unitgadjacentitsbottom to a point exteriorly Yofv the building bsothatV YVthe bees *will f I vhave opportunity togmovein'and outlasrequired Y `fortheirnormalcolonylife.=;rr .-5

' fThezbee, observation unit ofgthisinvention is designedfwith aviewgto thei coniinement of Vthe i ibes behind Window in anlenclosureswherein i i* Whichit-cooperates isiindicatedbest-in Fig.l2. With such at construction-,a 'connection @(not Vafter'. acceptanceland release, of the queen bee. Y' The. feed troughwhichdiesimmediately below-the top .cover ofthestructure'lis'sogrnade as to permit (1 rep lenishm'ent of'liquid iced, and (2) bees-to v enter. at fall-times thereintmbutnotzto escape from Y ,theenclosing structureyexcept.througlrthe run,-

' Way provided forthat purpose :A Afurther point oi advantage is a recess extending vertically behind thefqueenex'- cluderlplate at-one eindvwall of,theenclosure..Ex periencehas shown thatzbyrthe" provision o f suchv the provision ofagpartial barrier over a vertical passageway, the' jbeeswill tendto-droprefuse, deadV bodies-, -etc., to

the 'outside thereof y Without attempting `Yto carry such matter into the recessedpassagewaythrough `the openings lin'the excluder plate. gfj Theresult is i thaiiheserdrppngs'fall'onvenientlviv-iheioiltf side'goi` thesrecess Wheref'they, are `picked up-gfromtime@` timefor rmevalthrouen the r lewe.reoperIJ-f Y ringSiinfih 'efcluder plate-f0.0. 'Peints -iexteriqrly of:y f

' ihaen-losure- I n thispway an unobstructed-and ai {oleaner' Y'passagevvayfis,v maintained: behindr the VexcluderV plate at!v allitimes for theverticalmove-V r'nentof bees'into andeoutgoftheenclosure. f

The ,adapteriraillhereinbetore describedghas the meritLOfALlfaein,.gf @expensive t0 produca easy to instalL-andjeiective to close theV-entiregopening (save formapped-through'which the front 4end of the unit is extended). ,betv'veen2 the Winglow. sill andthe sash-rai'lfthereabove.; rfi com? `plication. ariseswhen thesill is downset and the closure, rin ,consequerneisv extended upwardly fromitworlevels` The metallic. sheathing which -V is slidably interlockedY Withthe adapter -rail provides, ineffectg-an extension piecerthat is adjustable lengthwisefas -required, to occupy a desired length of the'space tobeclosedyandits contour Which-'conforms'ito 'that of` itscooperating rail Vfurrish'es-the requisite interloeklaswellias `tvvo oppositely extending olse'tshoulders which co act fli'th the silliaid sash to render the `*clciisure trulyweathertightf i The ,impr'overnentsV into the present-bee observationfunitarq such as to facilitate, Vandfalso minimize, thecareand attentionthat Vis Ariequisiteffor, the maintenance -V bees Withinv the enclosure. lfhatevr needbe donew in the .Way-ofV supplying :foodgrem'oving debris,l cleaniirg vout, get c.,l can be attendedto.` eicessfully; looked after'. 5 Y

the same end grooves'... 1 v `2'. A bee observation unitiniipheY ior'moi ani 'releasable sustaining entA side 'tl1ereab r.1ve' V bottom, a .transparent' sidefreceivable through" f the bottom yslot and upwardly 'movablethere-x through to Vbe Yguidedgby; supported Within' thefopposite'grooves inthe ends,y a"l topclosure Yfor the enclosingstructure vmovableftn exposethe groovesupon .theirpppr extremities, and I means movably associated v'with the bottom yfor sustaining the'l transparent side ina xe-d posie" tion to complete the 'enclosure' and: adapted; inav vsecond position, to permit they transparent sfide Y to Vsli'de'vertically r'or movement Vthrough the bottom and adapted to permitmovement' ofi la follower slide Vdovinwardly zWhileguid' Within with' a .releas'ably 201 l ends and abottom fand. at 'onejsidef anobsrva` space Within the"enolosingfstructura"a plurality of Yframes suspended'fwithin .the structuref'off iof the" bottom,fa transparent 'side slidablef through y trough Whicha'lextends alenfgth'wis Withinthe the boi-,toni slot to ocoupyi al'biosure position;

Within the observation opening at thejside of 'the-V enclosing structure; the top'vvhen moved aor- -1 t .f30` fing aceess'to'la descending slifdeto goccupyi the Vposition vacated by. thetransparent side;v and; :closure means forthe lbottom slot removably as-j'` f sociated therewith,'free and olearfovlthe suse* Vpel'ided frames thereabove;"andfurnishing a 3. A beeobservation unit inthef'formfof an enclosing structure haviigspaced' sides with ay removable coverthereover 'andtherebelovv aieed trough I' which extends lengthwise, Within the supportA for thev transparf Y j structure vfrom one v end thereof'toward the other v' but short thereof to provide vbeyond one fend 4o' the feedktrough an' open j space Within the structure alongone' 'end thereofgjthe sides or `the feed trough being spaced' 'inwardlyfvrom the Y proximate sides( o f 'the' structure,' 'aoover for the feed'y trough extending'forsubstantially the '.fullj- Widthbetvveen thesidesfofthestructure; means"` toy..

ApositlonforA exposure of-the' topledge'offvthe V space beyond the feed trough jendg-'afqueen'cage' opening conmunictingLi-{iie spate ln; below', and'rneansfor supporting thequeenca e."

movable relative! thereto to -openA i or clo's I i 6 ;L 'A n.bee v observationl unit thellform 251 enclosing? struc'z'ture{liavinlg formecizwini a guidefacin the; other; :a trans? parentrsi'de Slidbly received Within and adapted coverIor the enclosure.' extending .forffthe ina x'ed position'yvithin-the pen paeeato' el.. i

fs'tructur'e'" from one' I end -VVthere'off'to v'pro-vide 'beY yondone! end of-,the-feed 'trough .-"anfopen' gspa e yWithin lthe structure Y' along' V"onel-rv end'l thereof coveriorii'the freed -trough,; mea'ns`forming extension j {beyondnthe Vfe'ed trough cover Y and `:the spacenbeyond the feed trough end,1 a-qu'een cage receivable l within the spaoe'igbeyond rthe 'fend Aoff' the. feeds-trough when?. thesc'ove zextensiona'isf "plugged opening? comm nica enclosingf'structure; having 'spacedv sides'i'v'vit removablelcover"thereoverand?therebeloWf-aled f Vstructure from on'ezend thereoi.A rov'ide be#V4 f A i Open-Spacer Within: the :structure along-i*oliegendthereof;Y

. 7. A'bee observation* uni to abe' supported-*by th'` guides vat ftheiendsg' ai distance `betvveenf tthe"lends andfm'ovab-le 'to Ytransparent*Sidewhereby t0 permit s'uc'n 'side' toi' receivable Within the V.space 'beyond 'the end of i i Athe feed ltrough yv'vhen "the -cover extensionwis moved to 'open position, theicage being' provided f with a releasably plugged .openngcommunicat-- f ing with the spaceV therebelovv,1 andi means fory supporting the queen cage in a med-'position Within the open space at one endlofthe feed-v trough. x

, observation unit in the form of an' enclosingv structure havingv spaced {side'svvith a. removable. cover. thereoverv` and .therebelow a feedtrough which vextends lengthwise 'Within Athe vstructure from one end thereof toward thegother but-short thereofftoprovide'beyondf'oneend'of .v u I betweenztheends and the enclosure through' the feed trough an open space within'the structure along one end thereof, a cover for the lfeed trough, means forming' an extension for the beyond the end ofthe feed trough when the coverextension'is moved to open positiongthe cage being provided with a releasably plugged' side atvv opposite ends thereof, a'bottomjfor -the position i within the Vstructure "below Vthe transparent sidefh'av n y slot through which rte-underlie the side tovfurnish asustaining'sup'fport therefor Wherebyto 1 i8.' A beer'observation unitin thefform of-van', enclosing structurehaving a'movable. top'gand' behind, Vmeans `forming-az 'lateral' support g for v`the fthe side maybe siidi'ifern cally for vremoval from or .insertionintozthe structur'e, and means cooperating WithY the.' `bot tom `and movable vvithi'resl'aectA thereto adapted i 'y y l normally rmaintain the side in a xedpo'sition above the bottom."v y

vertical ends between brood' frames suspended' movable intov and" out of vthe observation opening dow opening to' complete :thefenclosureythere' structurebelowthe sideghavirig a 'slot throughf Whichthe side may belvertically slid into or voutY ofthe structure, the topvvhen moved t" 

